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% of removal<br />

100<br />

80<br />

60<br />

40<br />

20<br />

0<br />

Effect of pH<br />

Temperature = 25<br />

PPy<br />

Fe O<br />

3 4<br />

PPy/Fe O<br />

3 4<br />

O C<br />

Dose = 2 g/L<br />

0 2 4 6<br />

pH<br />

8 10 12<br />

© CSIR 2010 Slide 15<br />

Initial concentration = 200 mg/L

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